Electrical Machine Collector Compartment Cooling
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Solution Overview
Problem
Current electrical machine cooling systems, particularly in the collector compartment, face inefficiencies in heat dissipation, leading to potential damage from excessive heat and requiring cumbersome auxiliary cooling modules for vertical installations, which increase cost and complexity.
Innovation Solution
The implementation of a finned heat exchanger positioned within the collector compartment, coupled with an air conveyor system that allows for efficient heat transfer using a modular design, enabling effective heat dissipation without the need for auxiliary cooling modules, even in vertical installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If pipe heat exchangers are used for cooling the collector compartment, then heat dissipation function is provided, but heat dissipation efficiency is insufficient and device complexity increases
Solution Approach 1:
The patent replaces the mechanical pipe heat exchanger system with a heat sink that utilizes the rotor's rotational motion. The rotor blades act as cooling fins that directly dissipate heat from the collector compartment through convection and radiation, eliminating the need for separate pipe-based heat exchange mechanisms and auxiliary fans in vertical installations.
Solution Approach 2:
The rotor serves multiple functions: it performs its primary function of driving the load while simultaneously acting as a heat dissipation device through its blade structure. The blades function both as mechanical drivers and as thermal exchange surfaces, integrating cooling functionality into the existing rotor without requiring separate dedicated cooling components.
2Reliability
If auxiliary cooling modules are added for vertical installations, then cooling function is provided, but cost and device complexity increase
Solution Approach 1:
The rotor itself provides the cooling function through its blade structure, utilizing its own rotational motion to generate the necessary air flow for heat dissipation. The system serves itself by using the rotor's inherent operational characteristics (rotation) to perform the additional function of cooling, eliminating the need for separate auxiliary cooling modules.
Solution Approach 2:
The cooling function is merged with the rotor structure by designing the rotor blades to function as heat dissipation fins. The rotor and cooling system become a single integrated component rather than separate elements, reducing overall system complexity while maintaining cooling reliability.
3Ease of operation
If fan is positioned at distance from rotating shaft opening, then correct air flow passage is achieved, but overall machine size increases
Solution Approach 1:
The air flow generation function is merged with the rotor's rotational motion itself. The rotor blades, through their rotation, directly generate the necessary air flow for cooling without requiring a separate fan component, thereby eliminating the space constraints and size increases associated with positioning fans at specific distances from the shaft opening.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances heat dissipation efficiency within the collector compartment, reduces the overall size of the electrical machine, and simplifies installation and maintenance while maintaining cost-effectiveness.
Implementation Method 1
the surfaces of the pipes are thermal exchange surfaces, through which the heat generated inside the compartments of the electrical machine is transferred to the cooling air
Implementation Method 2
a cooling system adapted to dissipate the heat generated by the stator and rotor inside the motor compartment and by the electrical connections inside the collector compartment
Implementation Method 3
the cooling system comprises means adapted to force inside of it a cooling air flow constituted by air collected from the external environment, flowing from the pipe inlet openings of the two heat exchangers towards the pipe outlet openings of the first heat exchanger
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An electrical machine (1) comprising: - a first compartment (2), or motor compartment (2), housing an electric motor (11) mounted on a rotating shaft (5); - a second compartment (6), or collector compartment (6), housing an electrical circuit (10, 12, 13) adapted to connect the electric motor (11) to a power supply source; - a cooling system (100) adapted to dissipate the heat generated by the electrical machine (1). The cooling system comprises at least a finned heat exchanger (200) adapted to dissipate the heat generated by the electrical circuit (10, 12, 13) inside the second compartment (6).